<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <script>
        class Dec2Bin {
            stack = []

            toBin(val) {
                let num = val
                while(num > 0) {
                    this.stack.push(num % 2)
                    num = parseInt(num / 2)
                }

                let binStr = ''
                while(this.stack.length > 0) {
                    binStr += this.stack.pop()
                }

                return binStr
            }
        }
        let o = new Dec2Bin()
        console.log(o.toBin(100))
    </script>
</body>
</html>